Greenwood Commissioners of Public Works officials showed the corrosive effects of fluoride during a Thursday presentation to board members.

Since January, Greenwood Commissioners of Public Works users have been drinking fluoride-free water, unbeknownst to them or the utility’s governing board until engineers made the disclosure during a board meeting last week.

Nothing about the move runs afoul of state or federal guidelines. CPW water department director Danny Ware said officials notified regulators about their plan from the outset, and remain in contact with them as the chemical is phased out of Greenwood’s water supply.

Contact staff writer Adam Benson at 864-943-5650 or on Twitter @ABensonIJ.